function Connection() { }

Connection.prototype = {
    
    instance: null,

    /**
     * @author: 小林
     * @description : 
     * @return string
     */
    openDb: function(){
        if (Connection.prototype.instance == null) {
            Connection.prototype.instance = window.openDatabase("Atodekau-data", "1.0", "atodekau", 200000);
        }
        return Connection.prototype.instance;
    },
    closeDB: function() {
        Connection.prototype.instance = null;
    }

};
